Liquid door-check.



No. 650,534 Patented m 29, I900:

W. K. HENRY. I

LIQUID DOOR -CHECI(..

Application filed July 27, 1899.) (No Model.) 3 Sheets-8heet l.

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INVENTOR 2 A Home] ITNESSES Patented May 29, I900.

W. K'. HENRY.

LIQUID 'DOOR CHECK.

(Application filed Jul v No. 650,534.

3 Sheets-Sheet 2 '(No Model.)

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INVENTOR I WITNESSES No. 650,534. Patented May 29, I900. W. K. HENRY.LIQUID DOOR CHECK. (Application filed July 27, 1899.) (lo Mndel.) 3Sheets-sheaf 3.

[N VEN T OR Attorney WITNESSES UNITED STATES,

P TENT @rnrbsi.

\VILLIAM K. HENRY, OF NE\V BRITAIN, CONNECTICUT, ASSIGNOR TO THE P. d:F. CORBIN, OF SAME PLACE.

LIQUID DOOIR'I-CHECK.

SPECIFICATION forming part of Letters Patent No. 650,534, dated May 29,1900. Application filed July 27, 1899. dcrial No. 725,318. (No model.)

To all whom, it may concern.-

Be it known that 1, WILLIAM K. HENRY, of New Britain,in the county ofHartford and State of Connecticut, have invented certain new and usefulImprovements in Liquid Door Closers and Checks; and I do hereby declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

. My invention relates to an improvement in liquid door closers andchecks, the object being to provide a combined closer and check whichcan without any change or alteration whatever and without any change ofadjustment be used on either a right or left hand door or on adouble-acting door; and it consists in the parts and combinations ofparts, as will be more fully described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view in front elevation ofmy door-check, showing a portion of the door and its casing. Fig. 2isaplan view of same. Fig. 3 is a view in longitudinal section of thecheck. Fig. 4

is a view showing the internal mechanism removed from the casing, theparts being in proper relative positions. Fig. 5 is a view in section onthe line a: a: of Fig. 3. Fig. 6 is a View in section of the casing,showing the rib on the inner face of the spring-cylinder; and Fig. 7 isa detached View of the piston.

A represents the casing, divided interiorly by the partition B, whichlatter is provided centrally with an opening for the passage of thespindleC and with an integral gland C and sleeve D, the gland projectingupwardly into the spring-chamber E and the sleeve D projectingdownwardly into the piston-cham- 0 her F. This partition B isscrew-threaded externally to engage threads on the inner face of thecasing A and when secured in place elfectually prevents the passage ofliquid around the outer edge of the partition. The lower end of thecasing is closed by an integral head, and the upper end thereof isclosed by a removable cap G, which latter has a central opening for thepassage of the spindle C. This spindle 0 passes the cap G and throughthe spring-chamber E and gland 0 into piston-chamber F and is providedat its lower end with a pintle a, carrying the antifrictionroller a,which latter rests in the double-inclined slot H in the piston I. Thispiston is provided with a central cavity open at the top, in which thelower end of the spindle C rests, and the double-inclined slot H opensinto this recess, thus permitting the spindle to have a free rotarymovement and the antifriction-roller carried by the spindle to freely 6otraverse throughout the length of the doubleinclined slot. Then thecheck is used on either a right or left hand door, theantifriction-roller would simply move through one inclined section ofthe slot, but in a doubleacting door the roller would move in bothsections of the slot. The piston is down or adjacent to the closed endof the casing when the door is closed, and when in this position theantifriction-roller rests in the upper portion of the slot H or at thejuncture of the two downwardly-inclined sections. Hence it will be seenthat the spindle is free to be turned either to the right or the leftand when turned in either direction positively draws the piston towardthe partition B. The piston is prevented from turning in its chamber orcylinder by the spline d, which latter is seated in a recess in thecasing and enters a recess or groove in the piston. The spindle C passesthrough the sleeve D and gland C, the latter carrying a suitable packinge, yieldingly held in place by the spring f, the latter being maintainedunder tension by the nut. g, screwed into the upper 85 end of gland.WVith this construction it will be seen that all leakage of oil uparound the spindle is prevented, and as the enlarged head it of thespindle rests under and in contact with the lower end of the sleeve any0 pressure of oil above the piston tends to force the head more tightlyagainst the sleeve. This construction, together with the packing in thegland C, prevents the possibility of the passage of any liquid upwardlyinto the 5 spring-chamber.

Located within the spring-chamber is the clutch-section J. This sectionJ consists of a block having a central bore for the free passage of thespindle and recessed on its un- :00 der side to fit over and on theupper end of the gland C. This block is provided at its lower end withan outwardly-projectin g flange t', having an upwardly-projectingshoulder j, which latter is engaged by one side of a rib j, integralwith or secured to the inner face of the spring-chamber. The block orclutchsectionJ is also provided with a second shoulderj located in aplane slightly above the shoulder j and nearer the center of the block,a space being formed between the two shoulders for the lower end of thespiral wire spring K. The lower end of the spring terminates in a hookwhich enters an opening in the flange i of the section or block J. Thisspring extends approximately the length of the spring-chamber and issecured at its upper end to the flange Z of the upper clutchsection orblock J which latter is provided at its outer edge with a dependingshoulder m, adapted to engage the opposite side of rib 2:) j in thechamber and is provided at a point clutch-section J nearer its centerwith a second shoulder m adapted to be engaged by the intermediateClutch-section J 2 rests on the nut L, secured to the spindle O, and thenut in turn rests on and secures the clutchsection J in place, thelatter being secured on an angular section of the spindle, so as to turnwith the spindle, while the clutch-sections J and J are free to turn onthe spindle. Clutch-section J a is provided with a laterallyprojectingshoulder m which rests between the shoulder j on the lowerclutch-section and the depending shoulder in of the upperclutch-section. Hence it will be seen that when the spindle G is turnedin one direction the cam or projection m on clutch-section J engages theprojection on one clutchsection J or J 2 and turns same. As shown inFig. 4:, the shoulders m and 9' on the clutchsections J 2 and J rest onopposite sides of and engage the projection or cam m on the intermediateclutch-section J and said clutchsections J and J 2 are so engaged by therib j in the spring-chamber as to prevent the shoulders m and 7' frommoving toward the cam m Hence it will be seen that when the cam m isturned by the rotation of the spindle 0 one of the clutch-sectionsremains stationary while the other turns with the spindle, and byturning the spindle in the opposite direction the clutch-section thatwas formerly held stationary moves while the other is held stationary.

Thus it will be seen that the check can be applied to either a right orleft hand door or to a double-acting door without any manipulationwhatever of the check or any parts thereof, the apparatus being at alltimes in condition for attachment to any of the forms of doors abovementioned.

The lower end of thecheck is provided with a vent-tube N, suitablysecured thereon and passing through a centrally-located opening in thelower end of the piston. This venttube is provided at a point near thelower end of the cylinder with an opening 0, which can be more or lessclosed by the screw-valve 0', and the head of the piston is providedwith ball or other valves which open and permit the free passage ofliquid to the lower part of the cylinder while the piston is beingraised by the opening of the door, but close and retard the movement ofthe liquid while the piston is descending.

I make no claim to the vent-tube and valves, as the same are shown anddescribed in application Serial No. 703,377, filed by O. 0. Case January25, 1899.

The upper end of the spindle is angular in cross-section for theattachment of the jointed links 0, which connect the spindle to thedoorcasing and may be of any approved form and construction.

It is evident that many slight changes might be resorted to in therelative arrangement of parts herein shown and describedwithoutdeparting from the spiritand scope of my invention. Hence I wouldhave it understood that I do not wish to confine myselfto the exactconstruction herein shown and described; but,

Having fully described my invention, what I claim as new, and desire toseen re by Letters Patent, is-

1. The combination with a casing divided into two compartments and aspindle passing through one compartment into the other, of adouble-acting-spring located within one of said compartments andconnected at its ends to the spindle, and a double-acting piston locatedin the other compartment and actuated by said spindle.

2. The combination with a casing divided into two compartments and aspindle passing through one compartment and terminating at one end inthe other, of apiston located in one compartment adjacent to the innerend of the spindle and provided with a double-inclined groove engaged bya projection on the spindle, a double-acting spring located within theother compartment and means for connecting both ends of the spring tothe casing and to the spindle, substantially as set forth.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

\VILLIAM K. HENRY.

Witnesses:

ALBERT N. ABBE, LAUREN M. BANCROFT.

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